Update {virtual,override,final} to follow C++11 style in tools.

tools/android/heap_profiler/heap_profiler_unittest.cc

Index: tools/android/heap_profiler/heap_profiler_unittest.cc
diff --git a/tools/android/heap_profiler/heap_profiler_unittest.cc b/tools/android/heap_profiler/heap_profiler_unittest.cc
index d69af5f7fbb45920f93886a7272dabe9ec558ee7..1771a88a61c5454453cb6513e163b83a90f188b2 100644
--- a/tools/android/heap_profiler/heap_profiler_unittest.cc
+++ b/tools/android/heap_profiler/heap_profiler_unittest.cc
@@ -14,9 +14,9 @@ namespace {
 
 class HeapProfilerTest : public testing::Test {
  public:
-  virtual void SetUp() override { heap_profiler_init(&stats_); }
+  void SetUp() override { heap_profiler_init(&stats_); }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     CheckAllocVsStacktaceConsistency();
     heap_profiler_cleanup();
   }